If you are looking for the Windows 10 SDK, it’s available here:
Windows Software Development Kit (SDK) for Windows 10
You will see a link for “Download the standalone SDK”.
Click on it.
The direct link is:
Note: The Windows Performance Toolkit (WPT better known as WPRUI/WPR/Xperf) that ships with Windows 10 ADK/SDK is not compatible with Windows 7 SP1 or Windows Server 2008 R2 SP1. The stack (module!function) will show up as ???!???. Use the Windows 8.1 ADK/SDK instead.